Remove Water from Yogurt/Sour Cream (Optional)
To ensure your tzatziki sauce achieves a thick, creamy texture, strain the yogurt and sour cream beforehand. Place a fine mesh strainer over a bowl, ensuring there’s sufficient space between the bottom of the strainer and the bowl to catch the drained liquid.
Line the strainer with a coffee filter to act as an additional barrier. In a separate bowl, combine the Greek yogurt and sour cream until well blended. Spoon the mixture carefully onto the coffee filter, spreading it out evenly. Place the entire setup in the refrigerator for at least 4 hours, or leave it overnight for optimal results. This process allows excess moisture to drain, resulting in a more concentrated and velvety base for your tzatziki sauce.